CN113005759A - Carbon nanotube fiber continuous energization enhancing device and method - Google Patents
Carbon nanotube fiber continuous energization enhancing device and method Download PDFInfo
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 148
- 239000000835 fiber Substances 0.000 title claims abstract description 146
- 239000002041 carbon nanotube Substances 0.000 title claims abstract description 132
- 229910021393 carbon nanotube Inorganic materials 0.000 title claims abstract description 132
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000002708 enhancing effect Effects 0.000 title claims description 14
- 238000012545 processing Methods 0.000 claims abstract description 56
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 25
- 239000007789 gas Substances 0.000 claims description 18
- 229910002804 graphite Inorganic materials 0.000 claims description 17
- 239000010439 graphite Substances 0.000 claims description 17
- 230000001681 protective effect Effects 0.000 claims description 12
- 230000007246 mechanism Effects 0.000 claims description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 239000011261 inert gas Substances 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 230000008569 process Effects 0.000 description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- 230000002787 reinforcement Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 229920000049 Carbon (fiber) Polymers 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 3
- 239000004917 carbon fiber Substances 0.000 description 3
- 238000005056 compaction Methods 0.000 description 3
- 239000002657 fibrous material Substances 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
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- 230000006872 improvement Effects 0.000 description 2
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- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000005388 borosilicate glass Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
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- 150000001875 compounds Chemical class 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 239000010453 quartz Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M10/00—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/40—Fibres of carbon
Abstract
The invention discloses a carbon nanotube fiber continuous energization reinforcing device and method. The carbon nanotube fiber continuous energization reinforcing device comprises: the carbon nanotube fiber processing device comprises a paying-off device, a take-up device and a processing chamber, wherein the processing chamber is arranged between the paying-off device and the take-up device and can be used for carbon nanotube fibers to continuously pass through, two electrodes are arranged in the processing chamber at intervals, and when the carbon nanotube fibers pass through the processing chamber, the carbon nanotube fibers can be in sliding fit with the surfaces of the electrodes and form ohmic contact. The carbon nanotube fiber continuous electrifying reinforcing device provided by the embodiment of the invention can realize the roll-to-roll continuous processing of the carbon nanotube fiber, thereby realizing the mass reinforcing of the carbon nanotube fiber.
Description
Technical Field
The invention particularly relates to a carbon nanotube fiber continuous energization reinforcing device and method, and belongs to the technical field of carbon nanotube fiber synthesis.
Background
The carbon nanotube fiber material is a macroscopic fiber material assembled by a large number of single carbon nanotubes with nanometer scales and carbon nanotube bundles. The carbon nanotube fiber has wide application prospect in the fields of composite materials, energy storage, functional devices and the like due to excellent mechanical, electrical and thermal properties. So far, the mechanical and conductive properties of carbon nanotube fibers are still several orders of magnitude lower than those of single carbon nanotube, which greatly limits the application of carbon nanotube fibers, and how to realize the mechanical enhancement of carbon nanotube fibers becomes the key point of the research and development of carbon nanotube fiber products at present.
The weak van der waals interaction is mainly used among the carbon nanotubes in the carbon nanotube fiber, the carbon nanotube fiber breakage mechanism is mainly the slippage among the carbon nanotube tubes, and the enhancement of the acting force among the carbon nanotube tubes is an effective method for realizing the high-strength fiber. At present, some researchers have conducted research work on mechanical reinforcement of carbon nanotube fibers, for example, j.n.wang (j.n.wang, et al.nature Communications,2014,5,3845) greatly improve the mechanical strength of carbon nanotube fibers by a method of roll compaction, the highest strength of the fibers reaches 8-9GPa, but the internal structure of the fibers is damaged in the roll compaction process, so that defects are formed, the fiber load is reduced after treatment, and the improvement of the fiber strength mainly depends on the reduction of the fiber sectional area in the compaction process; therefore, the carbon nanotube fiber densification and reinforcement technology mainly depends on the reduction of the fiber sectional area, and the fiber load performance is sacrificed; x.h.zhang (y.han, et al.scientific Reports,2015,5,11533) compounds carbon nanotube fibers with resin to enhance inter-carbon nanotube forces within the fibers, achieving an improvement in mechanical strength; the method mainly comprises the steps of introducing a resin material into fibers to form the carbon nanotube fiber/resin composite fiber, wherein the introduction of the resin can greatly improve the load and the mechanical strength of the fibers, but the introduction of the resin material can reduce the electrical conductivity, the flexibility and the high temperature resistance of the fibers, greatly improve the density of the fibers, and ensure that the composite fiber cannot bear higher temperature due to the phenomena of melting, decomposition and the like of the resin at higher temperature; J.T.Di (Y.H.Song, et al.nanoscale,2019,11,13909) uses a method of energization enhancement to realize the enhancement of the interchannel C-C chemical bonding in the carbon nanotube fiber, and the mechanical strength of the fiber is improved; however, the currently adopted device and process method can only realize the treatment of the fiber with the length less than 1 meter, and cannot realize large-scale continuous treatment. Therefore, how to realize continuous reinforcement of the high-strength carbon nanotube fiber is still a technical problem to be solved in the industrial application of the carbon nanotube fiber material.
Disclosure of Invention
The invention mainly aims to provide a device and a method for continuously electrifying and enhancing carbon nanotube fibers, so as to overcome the defects in the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention comprises the following steps:
the embodiment of the invention provides a carbon nanotube fiber continuous electrifying enhancing device, which comprises: the carbon nanotube fiber processing device comprises a paying-off device, a take-up device and a processing chamber, wherein the processing chamber is arranged between the paying-off device and the take-up device and can be used for carbon nanotube fibers to continuously pass through, two electrodes are arranged in the processing chamber at intervals, and when the carbon nanotube fibers pass through the processing chamber, the carbon nanotube fibers can be in sliding fit with the surfaces of the electrodes and form ohmic contact.
Further, the electrode comprises a graphite electrode, and the surface of the graphite electrode is smooth.
Furthermore, the graphite electrodes comprise graphite rods with the diameter of 5-30mm, and the distance between every two adjacent graphite electrodes is 2-30 cm.
Furthermore, the processing chamber is provided with an air inlet and two air outlets, the two air outlets are used as an inlet and an outlet for the carbon nanotube fibers to continuously pass through the processing chamber, the air inlet is connected with an air supply mechanism, and the air supply mechanism can lead protective gas into the processing chamber from the air inlet, so that an oxygen-free environment is formed in the processing chamber.
Furthermore, the pay-off device is also provided with a damper, and the damper is at least used for applying tensile tension to the carbon nanotube fiber which continuously moves between the pay-off device and the take-up device.
The embodiment of the invention also provides a method for continuously electrifying and enhancing the carbon nanotube fiber, which is characterized by comprising the following steps:
providing the carbon nanotube fiber continuous electrifying reinforcing device,
introducing protective gas from the gas inlet of the processing chamber to exhaust the air in the processing chamber so as to form an oxygen-free environment in the processing chamber,
connecting the two electrodes with a power supply, and enabling the carbon nanotube fibers released by the pay-off device to continuously pass through a processing chamber and be collected by a take-up device, wherein the carbon nanotube fibers are electrified in ohmic contact with the electrodes in the processing chamber.
Further, the carbon nanotube fiber passes between the two electrodes and is respectively in contact with different sides of the two electrodes.
Further, the protective gas comprises an inert gas or nitrogen; the flow of the protective gas is 0.5-5 SLM.
Further, the voltage between the two electrodes is 0.01-220 v.
Furthermore, the pay-off device is also provided with a damper, and the damper is at least used for applying tensile force to the carbon nanotube fibers which continuously move between the pay-off device and the take-up device.
Preferably, the magnitude of the tensile tension is 0.01 to 10N.
Further, the collecting speed of the take-up device is 0.01-50 cm/s.
Advantages of the invention over the prior art include
1) The carbon nanotube fiber continuous electrifying reinforcing device provided by the embodiment of the invention can realize the roll-to-roll continuous processing of the carbon nanotube fiber, thereby realizing the mass reinforcing of the carbon nanotube fiber;
2) the carbon nanotube fiber reinforcing mechanism processed by the carbon nanotube fiber continuous electrifying reinforcing device provided by the embodiment of the invention is used for reinforcing the C-C chemical bond acting force between carbon nanotube tubes in the fiber, so that the fiber load and the strength are improved;
3) the carbon nanotube fiber treated by the carbon nanotube fiber continuous electrifying reinforcing device provided by the embodiment of the invention is the all-carbon fiber, has high stability and can still maintain high mechanical strength at higher temperature.
Drawings
FIG. 1 is a schematic structural diagram of a carbon nanotube fiber continuous electrical enhancement apparatus according to an exemplary embodiment of the present invention;
FIG. 2 is a schematic structural view of the carbon nanotube fiber in cooperation with a graphite electrode in an exemplary embodiment of the present invention;
FIG. 3 is a graph showing the mechanical tensile properties of carbon nanotube fibers before and after the carbon nanotube fibers are subjected to continuous electrical strengthening treatment in example 1 of the present invention;
FIG. 4 is a graph of mechanical tensile properties of carbon nanotube fibers before and after continuous electrical strengthening treatment in example 2 of the present invention;
FIG. 5 is a graph showing the mechanical tensile properties of carbon nanotube fibers before and after the continuous electrical strengthening treatment in example 3 of the present invention.
Detailed Description
In view of the deficiencies in the prior art, the inventors of the present invention have made extensive studies and extensive practices to provide technical solutions of the present invention. The technical solution, its implementation and principles, etc. will be further explained as follows.
The invention provides a device and a method capable of realizing reel-to-reel continuous electrifying reinforcement of carbon nanotube fibers, realizes batch reinforcement post-treatment of the carbon nanotube fibers, and has the advantages of simple and feasible whole device and process and low cost.
The invention provides a device and a method capable of realizing large-scale continuous reinforcement of fibers, the acting force between carbon nano tubes in the treated carbon nano tube fibers is greatly improved, and the obtained fibers are all-carbon fibers and have excellent mechanical and electrical properties.
Referring to fig. 1, a carbon nanotube fiber continuous energization enhancing apparatus according to an exemplary embodiment of the present invention includes a wire releasing device 1, a wire rewinding device 5, and a processing chamber 4 disposed between the wire releasing device 1 and the wire rewinding device 5 and allowing carbon nanotube fibers to continuously pass through, two electrodes 6 are disposed in the processing chamber 4 at intervals, the electrodes 6 are electrically connected to a power source, and the carbon nanotube fibers can be in ohmic contact with the two electrodes 6 when passing through the processing chamber 4.
Specifically, two air outlets 2 are formed at two ends of the processing chamber 4, through which the carbon nanotube fibers can continuously pass and through which gas in the processing chamber 4 can be discharged, and an air inlet 3 is further formed at one side of the processing chamber 4, the air inlet 3 is connected with an air supply mechanism, and protective gas can be introduced into the processing chamber 4 through the air inlet 3 to discharge air in the processing chamber 4, so that an oxygen-free environment is formed in the processing chamber 4 during the process of performing power-on processing on the carbon nanotube fibers.
Specifically, the diameters of the air inlet 3 and the air outlet 2 are 2-10 mm.
Specifically, the material of the processing chamber 4 may be quartz, borosilicate glass, or other materials that are resistant to high temperatures and that allow observation of the internal conditions of the processing chamber.
Specifically, the electrode 6 may be a graphite electrode, and the surface of the graphite electrode is smooth, for example, the graphite electrode may be a graphite rod with a diameter of 5-30mm, and the graphite rod electrode may provide stable ohmic contact with the carbon nanotube fiber without damaging the carbon nanotube fiber during the sliding process of the carbon nanotube fiber.
Specifically, the distance between two adjacent graphite electrodes is 2-30 cm.
Specifically, the pay-off device is provided with a damper, and the damper is at least used for applying tensile force to the carbon nanotube fibers continuously moving between the pay-off device and the take-up device.
In some more specific embodiments, the process of treating the carbon nanotube fibers by using the carbon nanotube fiber continuous energization enhancing apparatus may include:
providing a carbon nanotube fiber continuous energization enhancing device shown in fig. 1, and connecting two electrodes with a power supply, wherein the voltage between the two electrodes is 0.0.1-220v, introducing a protective gas into the processing chamber through an air inlet to exhaust air in the processing chamber, thereby forming an oxygen-free environment in the processing chamber, wherein the protective gas can be an inert gas or nitrogen, and the introduction flow rate of the protective gas is 0.5-5 SLM;
the carbon nanotube fiber enters the processing chamber from the pay-off device through the air outlet hole at one end of the processing chamber, and the carbon nanotube fiber extends out of the processing chamber from the air outlet hole at the other end of the processing chamber and is collected by the take-up device; adjusting a damper on the pay-off device to apply 0.01-10N tensile force to the carbon nanotube fiber while the pay-off device releases the carbon nanotube fiber, and controlling the collection speed of the take-up device to be 0.01-50 cm/s;
in the processing chamber, the carbon nanotube fibers are in ohmic contact with the two electrodes in sequence, and the carbon nanotube fibers are in contact with the upper and lower surfaces of the two electrodes respectively to ensure that the carbon nanotube fibers are in close contact with the electrodes, wherein the matching mode of the carbon nanotube fibers and the two electrodes can be as shown in fig. 2.
Example 1
Providing a carbon nanotube fiber continuous energization reinforcing device and a fiber with the original strength of 1.20N/tex as shown in figure 1, and performing energization treatment on the carbon nanotube fiber by adopting the carbon nanotube fiber continuous energization reinforcing device;
setting the distance between the two electrodes to be 3cm, introducing argon gas with the flow rate of 0.5SLM, setting the tension of the damper to be 1.5N, setting the voltage between the two electrodes to be 25V, and setting the collection rate of a take-up device to be 0.6 cm/s; the performance of the carbon nanotube fiber after treatment is tested, the mechanical strength curve after the test is shown in fig. 3, and as can be seen from fig. 3, the mechanical strength of the carbon nanotube fiber after treatment is enhanced by 30%.
Example 2
Providing a carbon nanotube fiber continuous energization reinforcing device and a fiber with the original strength of 0.79N/tex as shown in figure 1, and performing energization treatment on the carbon nanotube fiber by adopting the carbon nanotube fiber continuous energization reinforcing device;
setting the distance between the two electrodes to be 10cm, introducing argon gas with the flow of 2SLM, setting the tension of the damper to be 1N, setting the voltage between the two electrodes to be 70V, and setting the collection speed of the take-up device to be 5 cm/s; the performance of the carbon nanotube fiber after treatment is tested, the mechanical strength curve after the test is shown in fig. 4, and as can be seen from fig. 4, the mechanical strength of the carbon nanotube fiber after treatment is enhanced by 23%.
Example 3
Providing a carbon nanotube fiber continuous energization reinforcing device and a fiber with the original strength of 1.02N/tex as shown in figure 1, and performing energization treatment on the carbon nanotube fiber by adopting the carbon nanotube fiber continuous energization reinforcing device;
setting the distance between the two electrodes to be 30cm, introducing argon gas with the flow of 3SLM, setting the tension of the damper to be 2N, setting the voltage between the two electrodes to be 120V, and setting the collection speed of a take-up device to be 10 cm/s; the performance of the carbon nanotube fiber after treatment is tested, the mechanical strength curve after the test is shown in fig. 5, and as can be seen from fig. 5, the mechanical strength of the carbon nanotube fiber after treatment is enhanced by 25%.
The carbon nanotube fiber continuous electrifying reinforcing device provided by the embodiment of the invention can realize the roll-to-roll continuous processing of the carbon nanotube fiber, thereby realizing the mass reinforcing of the carbon nanotube fiber; the carbon nanotube fiber reinforcing mechanism processed by the carbon nanotube fiber continuous electrifying reinforcing device provided by the embodiment of the invention is used for reinforcing the C-C chemical bond acting force between carbon nanotube tubes in the fiber, so that the fiber load and the strength are improved; in addition, the carbon nanotube fiber treated by the carbon nanotube fiber continuous energization reinforcing device provided by the embodiment of the invention is an all-carbon fiber, has high stability and can still maintain high mechanical strength at a higher temperature.
It should be understood that the above-mentioned embodiments are merely illustrative of the technical concepts and features of the present invention, which are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and therefore, the protection scope of the present invention is not limited thereby. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. A carbon nanotube fiber continuous energization reinforcing device is characterized by comprising: the carbon nanotube fiber processing device comprises a paying-off device, a take-up device and a processing chamber, wherein the processing chamber is arranged between the paying-off device and the take-up device and can be used for carbon nanotube fibers to continuously pass through, two electrodes are arranged in the processing chamber at intervals, and when the carbon nanotube fibers pass through the processing chamber, the carbon nanotube fibers can be in sliding fit with the surfaces of the electrodes and form ohmic contact.
2. The carbon nanotube fiber continuous energization enhancing apparatus according to claim 1, wherein: the electrode comprises a graphite electrode, and the surface of the graphite electrode is smooth.
3. The carbon nanotube fiber continuous energization enhancing apparatus according to claim 2, wherein: the graphite electrodes comprise graphite rods with the diameter of 5-30mm, and the distance between every two adjacent graphite electrodes is 2-30 cm.
4. The carbon nanotube fiber continuous energization enhancing apparatus according to claim 1, wherein: the processing chamber is provided with an air inlet and two air outlets, the two air outlets are used as an inlet and an outlet for the carbon nanotube fibers to continuously pass through the processing chamber, the air inlet is connected with an air supply mechanism, and the air supply mechanism can lead protective gas into the processing chamber from the air inlet so as to form an oxygen-free environment in the processing chamber.
5. The carbon nanotube fiber continuous energization enhancing apparatus according to claim 1, wherein: the pay-off device is also provided with a damper, and the damper is at least used for applying tensile force to the carbon nanotube fibers which continuously move between the pay-off device and the take-up device.
6. A method for continuously electrifying and enhancing carbon nanotube fibers is characterized by comprising the following steps:
providing the carbon nanotube fiber continuous energization enhancing means as claimed in any one of claims 1 to 5,
introducing protective gas from the gas inlet of the processing chamber to exhaust the air in the processing chamber so as to form an oxygen-free environment in the processing chamber,
connecting the two electrodes with a power supply, and enabling the carbon nanotube fibers released by the pay-off device to continuously pass through a processing chamber and be collected by a take-up device, wherein the carbon nanotube fibers are electrified in ohmic contact with the electrodes in the processing chamber.
7. The method of claim 6, wherein the carbon nanotube fiber is continuously electrically enhanced by: the carbon nanotube fiber passes between the two electrodes and is respectively contacted with different sides of the two electrodes.
8. The method of claim 6, wherein the carbon nanotube fiber is continuously electrically enhanced by: the protective gas comprises inert gas or nitrogen; the flow of the protective gas is 0.5-5 SLM.
9. The method of claim 6, wherein the carbon nanotube fiber is continuously electrically enhanced by: the voltage between the two electrodes is 0.01-220 v.
10. The method of claim 6, wherein the carbon nanotube fiber is continuously electrically enhanced by: the pay-off device is also provided with a damper, and the damper is at least used for applying tensile force to the carbon nanotube fiber which continuously moves between the pay-off device and the take-up device; preferably, the tensile tension is 0.01-10N; and/or the collection speed of the take-up device is 0.01-50 cm/s.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115182077A (en) * | 2022-07-28 | 2022-10-14 | 中国科学院苏州纳米技术与纳米仿生研究所 | High-stability carbon nanotube fiber continuous reinforcement device, system and application thereof |
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